Portion of a shoe upper



FIG. 1 is a side view of a portion of a shoe upper showing a new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof; and,

FIG. 4 is a top view thereof.

The even broken line is environmental only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe upper, as shown and described. 